Model chemistry breakdown

Azen 1979 Massart et al. 1990 Gardiner 1997). This random effects model is often used in analytical chemistry to breakdown a total precision into its components such as between-days and within-days, or between-laboratories and within-laboratories in collaborative trials, to validate an analytical method using reference material. 

Observations show that about 25% of the observed mid-latitude ozone column depletion occurs above about 25 km, in the altitude range where gas-phase photochemistry is rapid and it is difficult for dynamics to compete (see e.g., SPARC, 1998). A further contribution due to PSC processing and to vortex breakdown is highly likely. Thus, a substantial chemical contribution of at least half of the trend in the column seems difficult to dispute even if locally-driven chemical ozone depletion in the mid-latitude lower stratosphere were to be substantially smaller than suggested by modelling studies and by the post-Pinatubo measurements described above. Thus, the evidence suggests that chlorine chemistry has played an important and very likely dominant role in the observed trends in mid-latitude ozone over the past two decades (for a recent review, see WMO/UNEP, 2003). 

H. D. Hurwitz I would like you to add some comments on your answer to Professor Parsons and to tell us how you introduce the chemistry of living cells in your treatment. Membrane fusion and breakdown must depend on the nature of lipids, but in the living cell membrane there are also proteins and the living membrane fluidity will be quite different from that of the model membrane. To what extent can the mechanism, which you observe on bilayers, be transposed to real living systems of the type, for instance, which Professor Berg, Professor Zimmerman and others have investigated ... 

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